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<blockquote data-quote="llJoEHoEll" data-source="post: 5968535" data-attributes="member: 610838"><p>I actually have the same problem. I have a Alpine cda-9807 with a older Rockford Fosgate Punch amp. When I previously had a Power Acoustik amp hooked up to some subs, I don't recall having the problem. I currently have the RF punch amp connected, and when I start my car the sub does the same thing as OP says, a loud thump when it turns on.</p><p></p><p>I have been told from someone that's it may be the the RF amp b/c it's an older amp, but OP has an Alpine PDX...idk. OP, what kind of HU you got?</p></blockquote><p></p>
[QUOTE="llJoEHoEll, post: 5968535, member: 610838"] I actually have the same problem. I have a Alpine cda-9807 with a older Rockford Fosgate Punch amp. When I previously had a Power Acoustik amp hooked up to some subs, I don't recall having the problem. I currently have the RF punch amp connected, and when I start my car the sub does the same thing as OP says, a loud thump when it turns on. I have been told from someone that's it may be the the RF amp b/c it's an older amp, but OP has an Alpine PDX...idk. OP, what kind of HU you got? [/QUOTE]
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